底导切换修复

@@ -16,7 +16,7 @@ PersistentStorage.persistProp('indexSettingChannelId', 0);
 @Component
 export struct TopNavigationComponent {
   private tabsController: TabsController = new TabsController()
-  @Prop _currentNavIndex: number;
+  @Prop _currentNavIndex?: number;
   // 顶导当前选中/焦点下标
   @State currentTopNavSelectedIndex: number = 0;
   // 顶导数据
@@ -35,7 +35,6 @@ export struct TopNavigationComponent {
   // 地方频道列表
   @State localChannelList: TopNavDTO[] = []
   readonly MAX_LINE: number = 1;
-
   //处理新闻tab顶导频道数据
   topNavListHandle() {
     let _channelIds: number [] = []
@@ -111,9 +110,11 @@ export struct TopNavigationComponent {
       AppStorage.set('indexSettingChannelId', this.homeChannelList[0].channelId)
     } else {
       let index = this.myChannelList.findIndex(_item => _item.channelId === this.indexSettingChannelId)
+      if (index > -1) {
         this.currentTopNavSelectedIndex = index
       }
     }
+  }
 
   isBroadcast(item: TopNavDTO) {
     return item.name === '播报'
@@ -122,8 +123,8 @@ export struct TopNavigationComponent {
   build() {
     Column() {
       // 顶部搜索、日报logo、早晚报
-      Column(){
-        Row(){
+      Column() {
+        Row() {
           FirstTabTopSearchComponent()
 
           Image($r('app.media.icon_ren_min_ri_bao'))
@@ -168,7 +169,8 @@ export struct TopNavigationComponent {
           })
         }.width('100%')
         .justifyContent(FlexAlign.SpaceBetween)
-      }.height('73lpx')
+      }
+      .height('73lpx')
       .width('100%')
       .justifyContent(FlexAlign.End)
       .backgroundColor($r('app.color.white'))
@@ -266,10 +268,8 @@ export struct TopNavigationComponent {
 
   aboutToAppear() {
     //处理新闻tab顶导频道数据
-    if (this._currentNavIndex === 0) {
     this.topNavListHandle()
   }
-  }
 
   aboutToDisappear() {
     AppStorage.set('channelIds', this.channelIds.join(','))